CN212157188U - Clean incineration system for municipal sludge - Google Patents
Clean incineration system for municipal sludge Download PDFInfo
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- CN212157188U CN212157188U CN202020628383.8U CN202020628383U CN212157188U CN 212157188 U CN212157188 U CN 212157188U CN 202020628383 U CN202020628383 U CN 202020628383U CN 212157188 U CN212157188 U CN 212157188U
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Abstract
The utility model discloses a clean system that burns of municipal sludge, the system burns the stove including the mud slurrying system, thick liquid delivery pump, storage thick liquid jar, stokehold delivery pump and the mud company that connect gradually, the mud company burns the stove and has bottom slag flowing hole and top exhanst gas outlet, exhanst gas outlet connects gradually sack cleaner, draught fan, desulfurizing tower and chimney. The utility model discloses the system is simple, energy-concerving and environment-protective, reduce investment and running cost, effective control solid waste pollutant discharge, friendly to the environment, mud mix the fever height.
Description
Technical Field
The utility model relates to a solid useless pollutant field of handling, a clean system of burning of municipal sludge specifically says so.
Background
In recent years, with the increasing awareness of environmental protection, the treatment rate of municipal sewage and industrial wastewater is also increasing. The quality of secondary pollutants, namely residual sludge, generated in the sewage treatment process is continuously increased, which brings new problems to environmental protection. The sludge of the municipal sewage treatment plant contains a large amount of organic matters, the content of nutrient substances is rich, and besides, the sludge also contains a large amount of pathogenic microorganisms and heavy metals. The current commonly used sludge treatment methods are as follows: sludge landfill treatment, sludge incineration treatment, sludge digestion treatment and sludge land utilization. The sludge incineration is a process of utilizing heat in sludge and additional auxiliary fuel to realize thorough harmless treatment of the sludge through combustion, and the sludge incineration system generally comprises a storage and transportation system, a drying system, an incineration system, a waste heat utilization system, a flue gas purification system, an electric automatic control instrument system, an auxiliary system and the like. Because the sludge contains a large amount of organic substances and heavy metals, the burned flue gas and fly ash need to meet the requirements of the pollution control standard for domestic waste incineration GB18485-2014, and the requirements of the national emission standard for malodorous pollutants GB14554-1993 need to be met in the processes of sludge storage, transportation and drying. Because the sludge drying and the flue gas treatment after incineration have higher cost, the treatment of sludge incineration is suitable for being carried out by utilizing a mixed combustion mode, and the existing furnace type with mixed combustion mainly comprises a fluidized bed, a cement rotary kiln and the like. Because the bed temperature of the fluidized bed is only 850-950 ℃, the furnace temperature is reduced due to wet sludge, dioxin gas is generated, the mixed combustion amount is very small and the fuel amount is less than 10%, dry sludge is mainly used, the sludge drying cost is still very high, meanwhile, because the bed temperature is not very high, unburned sludge still exists in fly ash, the indexes of fly ash pollutants exceed the standard due to heavy metals in the sludge, and the dioxin in flue gas also possibly exceeds the standard. Although the temperature of the rotary cement kiln is very high, the change of the cement components possibly caused by the complicated sludge components has little popularization value. According to incomplete statistics, only a small part of sludge of the current national urban sewage treatment plants is subjected to sanitary landfill, land utilization, incineration, building material utilization and the like, and the majority of sludge is not subjected to standardized treatment. The sludge contains toxic and harmful substances such as pathogens, heavy metals, persistent organic matters and the like, is not effectively treated, is very easy to cause secondary pollution to underground water, soil and the like, directly threatens the environmental safety and public health, and greatly reduces the environmental benefit of sewage treatment facilities.
Disclosure of Invention
The utility model aims at solving the technical problem and providing a clean incineration system for municipal sludge, which has the advantages of simple process, energy conservation, environmental protection, investment and operation cost reduction, effective control of solid waste pollutant discharge, environmental friendliness and high sludge mixing burning quantity.
The utility model discloses clean system of burning of municipal sludge, including the mud slurrying system, thick liquid delivery pump, the thick liquid storage tank that connect gradually, stokehold delivery pump and mud companion stove of burning, mud companion stove of burning has the slag runner and the top exhanst gas outlet of bottom, exhanst gas outlet connects gradually sack cleaner, draught fan, desulfurizing tower and chimney.
The sludge co-combustion furnace comprises a burnout chamber, a slag making chamber communicated with the bottom of the burnout chamber and a waste heat recovery chamber communicated with the top of the burnout chamber.
And a slurry spray gun connected with the stokehole delivery pump and the compressed air tank is arranged at the upper section of the burnout chamber.
And controlling the temperature of a hearth at the middle section of the burnout chamber to be higher than 1500 ℃, so that the slurry spray gun is positioned at the upper section of the burnout chamber at 1400 ℃.
And an SCR catalyst layer is arranged in the waste heat recovery chamber.
The upper section of the slag making chamber is provided with a burner, and an ash outlet at the bottom of the bag-type dust remover is connected with the middle section of the slag making chamber through a fly ash conveying pipe.
In the method for the municipal sludge clean incineration system, the sludge is prepared into slurry in the sludge pulping system, then the slurry is conveyed to the slurry storage tank through the slurry conveying pump, then the slurry is conveyed to the sludge co-combustion furnace through the furnace front conveying pump for combustion, the flue gas generated by the sludge co-combustion furnace is dedusted by the bag-type dust remover, then the flue gas is conveyed to the desulfurizing tower through the induced draft fan for desulfurization, and finally the flue gas is discharged by the chimney after reaching the standard.
The sludge co-combustion furnace comprises a burnout chamber, a slag making chamber communicated with the bottom of the burnout chamber and a waste heat recovery chamber communicated with the top of the burnout chamber; the slurry is sent into a burnout chamber for combustion, slag liquid falls into the bottom of the burnout chamber and is discharged through a slag flowing port at the bottom of a slag making chamber, and flue gas in the burnout chamber is sent into a bag-type dust collector after waste heat is recovered by a waste heat recovery chamber and denitrified by an SCR catalyst layer.
Controlling the temperature of a hearth at the middle section of the burnout chamber to be higher than 1500 ℃, positioning a slurry spray gun at the upper section of the burnout chamber at 1400 ℃, and feeding the slurry into the slurry spray gun to spray into the burnout chamber under the action of compressed air.
And ash at the bottom of the bag-type dust collector is led out from an ash outlet and is pumped into a slagging chamber of a sludge associated combustion furnace through a fly ash conveying pipe to be melted at high temperature for slagging.
The effective effect is as follows:
(1) the method directly prepares the water-containing sewage into sludge slurry, thereby adopting sealing equipment with pipelines and a tank car to carry out transportation and treatment, and effectively avoiding the volatilization of stink and secondary pollution in the processes of sludge filtration, dehydration and transportation;
(2) the sludge is directly incinerated in a slurry mode, the temperature of a burnout chamber of the sludge associated incinerator is controlled to be higher than 1500 ℃, so that the generation of dioxin in the incineration process can be prevented, the combustion blocking mixing amount of the sludge is increased, the environment is protected, and the standard emission of flue gas is ensured;
(3) the height of the spray gun is controlled to enable the sprayed slurry to be in countercurrent contact with the smoke at 1400 ℃, the high-temperature smoke preheats the slurry, the combustion of the slurry in the burnout chamber is facilitated, meanwhile, the smoke is cooled to be below 1000 ℃ and is sent into the waste heat recovery chamber, tail smoke is prevented from being subjected to quenching treatment, heat is fully recovered, and the doping amount of sludge co-combustion is further increased.
(4) The fly ash is sent into a slagging chamber for melting and slagging treatment, so that heavy metals in the sludge can be treated, and harmless discharge is achieved.
(5) The utility model discloses the system is simple, equipment investment and running cost are low, effective control solid waste pollutant discharges, to environmental protection, wet mud mixes the volume of burning (dry weight) and improves to more than 20% of fuel total weight.
Drawings
FIG. 1 is a system diagram and a process flow diagram of the present invention.
Wherein, the system comprises a 1-sludge pulping system, a 2-slurry storage tank, a 2.1-slurry delivery pump, a 3-stokehole delivery pump, a 4-sludge combustion furnace, a 4.1-slagging chamber, a 4.2-burnout chamber, a 4.3-slag runner, a 4.4-burner, a 4.5-waste heat recovery chamber, a 4.6-flue gas outlet, a 5-compressed air tank, a 6-slurry spray gun, a 7-fly ash delivery pipe, an 8-SCR catalyst layer, a 9-bag dust collector, a 10-induced draft fan, an 11-desulfurizing tower and a 12-chimney.
Detailed Description
The system of the present invention is further explained below with reference to the drawings:
referring to fig. 1, the utility model discloses clean system of burning of municipal sludge, including the mud slurrying system 1 that connects gradually, thick liquid delivery pump 2.1, slurry storage tank 2, stokehold delivery pump 3 and mud companion fire 4, mud companion fire 4 has the exhanst gas outlet 4.6 at the slag notch 4.3 and the top of bottom, exhanst gas outlet 4.6 connects gradually sack cleaner 9, draught fan 10, desulfurizing tower 11 and chimney 12.
The sludge associated combustion furnace 4 comprises a burnout chamber 4.2, a slagging chamber 4.1 communicated with the bottom of the burnout chamber 4.2 and a waste heat recovery chamber 4.5 communicated with the top of the burnout chamber 4.2; the upper section of the burnout chamber 4.2 is provided with a slurry spray gun 6 connected with the stokehole delivery pump 3 and the compressed air tank 5, and preferably, the temperature of a hearth in the middle section of the burnout chamber 4.2 is controlled to be higher than 1500 ℃, so that the slurry spray gun 6 is positioned at 1400 ℃ in the upper section of the burnout chamber 4.2; an SCR catalyst layer 8 is arranged in the waste heat recovery chamber 4.5; the upper section of the slag making chamber 4.2 is provided with a burner 4.4, and an ash outlet at the bottom of the bag-type dust remover 9 is connected with the middle section of the slag making chamber 4.1 through a fly ash conveying pipe 7.
The process comprises the following steps: the method comprises the steps of preparing sludge into slurry in a sludge pulping system 1, conveying the slurry to a slurry storage tank 2 through a slurry conveying pump 2.1, conveying the slurry into a sludge associated combustion furnace 4 through a furnace front conveying pump 3 for combustion, dedusting smoke generated by the sludge associated combustion furnace 4 through a bag-type dust remover 9, conveying the smoke into a desulfurizing tower 11 through an induced draft fan 10 for desulfurization, and finally discharging the smoke through a chimney 11 after reaching the standard.
In the sludge co-combustion furnace 4, the slurry is sent into a slurry spray gun 6 and sprayed into a burnout chamber 4.2 under the action of compressed air (the compressed air is provided by a compressed air tank 5), the sprayed slurry is reversely contacted with the rising flue gas at about 1400 ℃ for preheating and then falls to the middle section of the burnout chamber 4.2 to be used as an admixture and fuel to be combusted in the burnout chamber 4.2, the temperature of a hearth at the middle section of the burnout chamber is controlled to be higher than 1500 ℃, the generated slag liquid falls into the bottom of the burnout chamber 4.2 and is discharged through a slag flowing port 4.3 at the bottom of a slag making chamber 4.1, and the flue gas 4.2 of the burnout chamber is recovered with waste heat through a waste heat recovery chamber 4.5 and is sent into a bag dust collector 9 after being denitrated through an SCR catalyst layer 8.
The ash at the bottom of the bag-type dust collector 9 is led out from an ash outlet and is pumped into a slagging chamber 4.1 of the sludge associated burning furnace 4 to carry out high-temperature melting slagging under the action of compressed air through a fly ash conveying pipe 7.
Claims (6)
1. The utility model provides a clean system of burning of municipal sludge, its characterized in that, including the mud slurrying system, thick liquid delivery pump, storage thick liquid jar, stokehold delivery pump and the mud companion stove that connects gradually, the mud companion stove of burning has bottom slag tap and top exhanst gas outlet, exhanst gas outlet connects gradually sack cleaner, draught fan, desulfurizing tower and chimney.
2. The municipal sludge clean incineration system of claim 1, wherein the sludge co-firing furnace comprises a burnout chamber, a slagging chamber in communication with the bottom of the burnout chamber, and a waste heat recovery chamber in communication with the top of the burnout chamber.
3. The municipal sludge clean incineration system of claim 2, wherein the upper section of the burnout chamber is provided with a slurry lance connected to the stokehole transfer pump and a compressed air tank.
4. The municipal sludge clean incineration system of claim 3, wherein the temperature of the furnace in the middle section of the burnout chamber is controlled to be higher than 1500 ℃, and the slurry lance is positioned at 1400 ℃ in the upper section of the burnout chamber.
5. The municipal sludge clean incineration system according to claim 3, wherein an SCR catalyst layer is provided in the waste heat recovery chamber.
6. The municipal sludge clean incineration system according to claim 4 or 5, wherein a burner is provided at the upper section of the slagging chamber, and an ash outlet at the bottom of the bag-type dust collector is connected to the middle section of the slagging chamber through a fly ash conveying pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020628383.8U CN212157188U (en) | 2020-04-23 | 2020-04-23 | Clean incineration system for municipal sludge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020628383.8U CN212157188U (en) | 2020-04-23 | 2020-04-23 | Clean incineration system for municipal sludge |
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| CN212157188U true CN212157188U (en) | 2020-12-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412479A (en) * | 2020-04-23 | 2020-07-14 | 武汉耀立环保工程有限公司 | Clean incineration method and system for municipal sludge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412479A (en) * | 2020-04-23 | 2020-07-14 | 武汉耀立环保工程有限公司 | Clean incineration method and system for municipal sludge |
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